doc: promote cdt to tier 3

PR-URL: #43290
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Akhil Marsonya <akhil.marsonya27@gmail.com>

doc/contributing/diagnostic-tooling-support-tiers.md

@@ -114,6 +114,7 @@ The tools are currently assigned to Tiers as follows:
 | Profiling | V8 --interpreted-frames-native-stack | Yes | Yes | 2 |
 | Profiling | Linux perf | Yes | Partial | 2 |
 | Profiling | node-clinic | No | No | 3 |
+| Debugger | Chrome Dev tools | No | No | 3 |
 
 ## Tier 4
 
@@ -132,7 +133,6 @@ The tools are currently assigned to Tiers as follows:
 | Debugger | V8 Debug protocol (API) | No | Yes | 1 |
 | Debugger | Command line Debug Client | ? | Yes | 1 |
 | Debugger | llnode | ? | No | 2 |
-| Debugger | Chrome Dev tools | ? | No | 3 |
 | Tracing | trace\_events (API) | No | Yes | 1 |
 | Tracing | trace\_gc | No | Yes | 1 |
 | Tracing | DTrace | No | Partial | 3 |